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`R. B. BENJAMIN.

RECEPTACLE.

APPLICATION FILED NOV. 6. |915.

Patented Oct. 28, 1919 LSQQ,

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R. B. BENJAMIN.

RECEPTACLE.

APPLICATION FILED Nov. 6. 1915.

Patented Oct. 28, i919.

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R. B. BENJAMIN.

y RECEPTACLE. xPPLlcATloN man Nov. 6. 19u?l Lgw., Patented oct'. 28,1919.

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' MANUFACTURING COMPANY, or cHIcAGc-gILLINoIs, A ooRPoRA'TIoN or ILLI- NoIs.

Specification-of Letters Patent.

j NECEPTACLE.

Application led November 6, 1915-. Serial 1\To.,59,991.v f

To all whom t may concern.' t'

Be it known that I, REUBEN B. BENJAMIN,

a citizen of the United States, residing at Chicago, in the county of Cook and State 5 of Illinois, have invented new and useful Improvements in Receptacles, of which the following is a full, clear, concise and'exact description, reference being had to the accompanying drawing, forming a part ofthis specification. p, My invention relates to receptacles, that 1s, contact terminals for engagement with the corresponding contacts of an insertible device such as a lampbase or attachment plug. One of the objects of my invention is to provide an improved device of this character in which. the electrically charged parts are rendered diiiicult ofi access when the insertible device is removed from the receptacle.

Further objects will appear from the detailed description to follow taken in connection with the appended claims.

In the drawings, 'in `whichI have shown several embodiments of my invention- Figure lis a plan View of' a receptacleembodying my invention shown in connection with the cover plate; Fig. 2 isa section on the line 2 2 of Fig. 1;

Fig. 3 is Fig l; Fig. 4 is a plan view of the inner insu- Fig. 5 is a rear view ofthe outer insulating base and the parts supported thereby; v Fig. 6 is a plan view kof a modified form of receptacle; l F'Fig'. 7 is. a section `on the line 7 -7 of Fig. 8 is a.I section on the line 8 8 of Finl; r `g. 9 is a rear view of the outer insulatsecuring it onthe base 11. The member 29 ingbase and parts supported thereby; Fig. 10 is a front view of lating base and the parts supported thereby;

Fig. 1 1 is a plan view of a modification of my invention showingit in connection with a duplex wall receptacle;

Fig. 11; f

Fig. 13 is a section on the line 13-13 of Fig. 11; l

to electrical receptacles provided with a section j on the lline'3-3 of flating base and the parts supported .thereby the rear insu-l still further Fig. 12 is a' section on the. line 12-12 of 14@ is a section on the line 14-14 of Fig. 1'1; and a lv.I' l1,l`ig..15'isarear view of the outerinsulating base and the parts supported thereby;

-aiReferring no'w to the. drawings in detail Y and first tothe modilicatlon of Figs. 1 to 5,'

the parts here shown comprise a cover plate lqjfor an outlet box ortho like, an outer insl'ilat'ing base 1l for 4supporting various parts of the receptacle', a shell contact 12 supported by the base ll,a.movably mounted insulating "plunger l13, .fa center contact '14 carried-by the plunger 13, a spring contact lfelectrically connectedffwith the shell conratentedl oet. as, raie.

tact V12 and 'operated by the plunger 13, a

contact 16 electrically E:connected with the center contact, 14, and, afrear insulating base 17 'securedin proper relativeposition with respect to the outer basej'll, appontact 18 supported on the base 17 for engagement with thejspring contact 15a contact 19 supported onmthe base 17 vfor engagement with the contact 16, and bindingtrm-ina'ls 20 and. 21

electrically connected with the contacts 18 and 19, respectively. f The cover plate 1Q is provided with an opening 22 through which 'a portion of the receptacle extends andv with a flange 23 for 1 engV gement with a suitable support. VrFhe cover plate is secured in position by means of, screws 24. 'The oliter hase 11 has an annular flange 25 lextending through the' and a central recess 26 to recelve' openin thejf'she 1` contact 12. Afshoulder27 is providednear-the inner end ofthe recess 2.6 for engagement with aange28- on the shell convtact 12. The shellconta-ct 12 is held in position on lthe base 11 and electrically connected to the spring-contact 15 by `'an L- shaped member 29. one arm rofa'zvhifch is secured to the contact 12 by means of an eyelet 30, v'and the other arin of `which has a screw threaded opening to receive a screw 31 for the screw 31 extends, whereby it is firmly held on the base 11.

The tension in the spring 15 1s such as t0 normally hold the'plunger 13 in its outermost position. To equalize the spring pres sure on this plunger leaf spring 34 is provided on the side opposite the contact 15 which leaf spring also bears on the plunger and tends' to hold it in its outermost position. This leaf spring 34 is held in position on the base 11 by means of a screw 35 and nut 36. The rear base 17 is provided with two openings 37 and`38 affording passages for the leading-in wires adjacent the binding terminals 2O and 21. These binding terminals each comprises a binding plate 39, binding screw 40 and a screwv 41 holding the binding plate on the base 17. The receptacle'is held in place on the cover plate 10 by means of a' pair of clips 45 4secured to the rear base17 by means of screws 46` and to the cover plate by means of screws 47.

The use and operation of this receptacle is as follows: -With the parts in the position shown in Fig.2 the shell contact 12 and center contact 14 will both be dead or electrically disconnected andthe spring contact and spring 34 will hold the plunger 13 in its outermost position. When, however, theA plug'or lamp base is screwed into the shell contact l2 the center contact of the lamp base or plug will engage the center contact 14 and will force the plunger 13 1nwardly against the action of the spring contact 15 and spring 34 until the contact 15 engages the contact 18, and until the contact 16fengages the contact 19. This will establish a circuit through the receptacle and incenter contacts.

serted device, through the binding terminal 21, contact 19, contact 16, center contact 14,

'lamp circuit, shell contact 12, member 29,

spring contact 15, contact 18 and binding terminal 20. e .In the modification of Figs. 6 to 10 I have shown my invention in connection with a re.

ceptacle comprising an outer insulating base 48, shell and center contacts 49 and 50 supported by said base, contact springs 51 and 52a1so supported by said base and electrically connected with said shell and center contacts, respectively, an inner insulating base 53 supported in proper relative posi tion with respect to the outer base, and combined binding and contacting terminals 54 and 55 supported by the insulating base 53 for electrical connection with the contact springs 51 and 52, respectively. The outer base 48 has an annular flange 56 which eX-' `has a boss l58 at the bottom of the recess 57 to insure insulation between vthe shell and The shell contact 49 'isicut away at 59 to prevent short circuiting and is provided with ,a U-shaped fiange 60 for engagement with nuts 61-into which-screws 62 are threaded for holdingthe shell contact 49 on the base 48. One of these screws 62 is also utilized to secure the contact spring 51 in lplace and to electrically connect it with the shell acontact 49. The contact spring 52 is secured on thevbase 48 by means of a nut 63 and screw 64. The center contact 50 is mounted in an opening 65 in the base 48 and is provided with a shoulder 66 for engagement with a corresponding shoulder 67 on the base.` l

For insulating the contact springs 51 and 52 from each other, and for transmitting pressure `from the spring 52 to the spring 51, a spacing. member 68 is provided having depressions onjits opposite sides for engagement with corresponding projections 69 \and 70 on the contact springs 51 and 52. The 8e binding and contact terminals 54 and 55 each comprises a binding plate 71, a binding screw 72` and a screw I73 for. securing the binding platein position on the inner base 53. v The parts are held in position on th cover plate by means of clips `75 similar to the clips 45 of the form shown in Figs. 1 t0 5.: i i

The use and operation of this modiiication is as follows: -When the parts are in the position shown in Fig. 8 both of the con` tacts are ldead as the tension in the` springs 51 and 52 is such as to firmly hold them away froml engagement with the binding plates 71. When, however, the lamp base or attachment plug is screwed into the shell contact 49 the center contact of the inserted device will engage the center contact 50 and force it inwardly causing the springcon# 100 tacts 51 and 52vto be forced inwardly to engage the binding plates 71` this establishing a circuit: from the binding terminal 55 through the spring contact 52, center contact 50, lamp circuit, 'shell contact 49, screw 105 62, "spring contact 51 and binding terminal 54. v

In the modiiication of Figs. 11 to 15 I have shown my invention in connection with a duplex wall receptacle having one set of 110 terminals for engagement with an insertible device having a threaded shell contact and a center contact, and another set of contact terminals for engagement Ywith a detachable. insertible device such as the cap of a sep- 11.5 arable attachment plug. This wall base comprises an outer insulating base 76 for supporting the contact terminals and other parts, binding and Contact terminals 77 sup` ported by the base 76, a Vshell contact 78 also 120 supported by the base 76, an inner insulat- --the shell contact A78 and this recess A85 is entact member 89 is secured tact by means of an eyelet 90. The. outer" larged at 86 to accommodate a spring 87 which embraces the shell contact 78 and bears onthe liange 88 ofthe shell contact and the shoulder formed by the enlarge-v ment 86 of the recess 85. An L-shaped con# to' the shell c onand innerbases`76 and 79 are recessed at 91 and 91a respectively, to accommodate the L'shaped contact 89 and to guide the contact in its movement. A contact plate 92 is provided for the contact 89, this contact of movement of the contact 89, and an eX- -having an extension 93 located in the pathtension 94 for vconnection with o n/eJ` of the The. plate 92 is held on means of a screw 95 which plates- The blndlng plate 96 is provided withthe usual binding vscrew 97. The center contact 80 com rises a post or' rod 98 on which the plunger 1 slides, and a head 99 located in the recess 100 in when vthe plunger is in its outermost position. The center contact lis mounted on a yoke 101 secured on the base 76 by means 'of a screw 102 which extends through a'lateral extension 1,03 onthe yoke. also serves tohold the binding plate 105 in position and to electrically connect the yoke is provided -with the usual binding screw t 106. A'conductor'plate 104 leads from the screw 102 to one of the spring contacts 83.

i As a further means for holding the yoke in place it'is provided with a lateral eXtension 107 which is held between the inner and -outer bases. The plunger 81 is normally held iii its outermost position bymeans of a coil spring in an annular recess the other end of which bears against the base 7,9 and yoke 101. For holding the inner and outer bases together a screw 110 is threaded I. into. a nut 1-11. This screw also assists in holding the v spring contacts 83 position by 'engagement with a nut 112 to clamp the -contacts against the 'outer base 76. Suit- I ableinsulation 113 isl provided 'between the-v i' nut-112 and the cont'acts83.

provided. Both As a further means for holding the .inner and outer' bases together `screws 114 arethe inner `and outer' bases are recesses as shown at 115 to .provide a passage for the leading-in wires to the binding plates.5 v

ter contact 80 would be diiiicult of access as The vbinding plate 105 0 the plunger. whereby the center contact 1s rendered diicult of access This screw 102.

108 one en d of which is seated 109 in the plungerand plate 92.

win be dead as the Spring e7 holds the Shen tact of the lamp engages the center contactl of the receptacle. After thev center contacts are in engagement further rotation ofr the lamp base will cause the threaded shell 78 to move outwardly against the pressure `of the spring 87 until"'the contact 89 engages. the extension 93 of the conducting This will establish a circuit from the binding terminal 77, through the screw 102, yoke 101, cejnter contact 80, lamp circuit, shell contact 78, contact 89, contact rplate 92, screw 95 tothe other binding terminal-77.

inserted so that its contacts engage the contacts 83 afcircuit is established from one of the binding terminals 77 through the screw 102, conductor plate 104', spring contact 83 through the circuit of a translating device to the other contact 83 through the extension 94 ofthe conductor plate 92 through the screw95 tothe other binding terminal 77.

' Having thus described my invention what I claim as new and desire tol ters Patent is :f-

1l A receptacle having a shell contact moIvably mounted lto be electrically connected and disconnected with respect to the feed circuit, and a center contact, said contacts being constructed to engage the shell and c eter contacts of an insertible device, lsaid receptacle being constructed so that the Vhen the capfofl an attachment plug is secure by Leti `the shell contact into electrical connection.

mounted. for axial movement to be electrically connected and disconnected with rev" sertible device will move 'the shellcontact into electrical connection.

3. An electrical receptacle having a shell contact vmounted for axial movement, means 2. `A receptacle having a shell contact l whereby ywhen said shell Contact is in its inner position it is disconnected with respect j to the feed circuit, and` when in its outer pdsition it is connectedwith respect to the feed circuit, and acentercontact, said con- The use and operation of this modiicai v Assuming that lthe'parts aregin the position showni'n Fig. 14 thecentacts beingconstruct'ed to` engage the center and shell contacts of 'an insertible device, said receptacle being constructed s6 that the insertion cf lsaid insertible device will move the shell contact outward into electrical connection with respect to the feed circuit.

shell contact and a center contact, said shell contact being mounted for axial movement, whereby when an insertible device is screwed into said receptacle after engagement -withv 4said center contact said shell contact will' be drawn outwardly, and means whereby whenv said shell contact is drawn outwardly it will be electrically' connected with respect to the feedl circuit.

' 6. An electrical receptacle comprising a two-part insulating base, shell and center contactssupported by said base, said shell contact being mounted for axial movement, a fixed Contact electrically connected with respect to the feed circuit and located between said base parts, and a Contact carri-ed by said shell contact movable into and out of engagement with respect to said xed contact. 'v

7. An electrical receptacle comprising a center contact and a movably-mounted shell contact, means whereby movement of said shell contact will cause it to be-electrically g contacts supported thereby, said shell contacts being` movably mounted, meansfiivhere-A by movement of said shell contact will cause it to be electrically connected and vdiscon.

nected'with respect to the feed circuit, and sprlng means located betweer said base parts for normally holding said shellfcontact in ydisconnected position.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

Witnesses :g

P. D. PH 1LLIPs J. CLEARY.

, REUBEN -i3BENJAMiN. 

